What’s Vulnerable › Vulnerabilities

CVE-2021-24171: WooCommerce Upload Files < 59.4 - Unauthenticated Arbitrary File Upload

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-05 · updated 2026-06-17
• Weakness: CWE-434

Description

The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a "blocked" extension within another "blocked" extension in the "wcuf_file_name" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the "wcuf_current_upload_session_id" parameter.

Affected products

• WooCommerce Upload Files: before 59.4 — fixed in 59.4

How to fix

Upgrade to a fixed version: WooCommerce Upload Files 59.4. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194
• https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/
• https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194
• https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/

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